Mysterious Disappearances manga volume 5 features story and art by Nujima.

A few days after the Hime-uo Vtuber incident the King of Cats finally makes his appearance! Faced with the entity behind all the supernatural occurrences in the region, the Adashino siblings find themselves in an unprecedented crisis, and it is up to Shizuku to come to the rescue! She forms a new duo with Sumireko, and together they must discover the occult truth of the King of Cats before it's too late!